from decimal import Decimal

import pytest
from money.currency import Currency

from xexe.money_amount import DEFAULT_MAX_DECIMALS, MoneyAmount


def test_money_amount_simple_creation_works():

    an_amount = MoneyAmount(amount=10, currency=Currency.USD)

    assert an_amount.amount == 10
    assert an_amount.currency == Currency.USD


def test_money_amount_takes_integer_amounts():
    an_amount = MoneyAmount(amount=10, currency=Currency.USD)

    assert an_amount.amount == 10


def test_money_amount_takes_decimal_amounts():
    an_amount = MoneyAmount(amount=Decimal(10.5), currency=Currency.USD)

    assert an_amount.amount == Decimal(10.5).quantize(DEFAULT_MAX_DECIMALS)


def test_money_amount_takes_proper_strings_amounts():
    an_amount = MoneyAmount(amount="10.55", currency=Currency.USD)

    assert an_amount.amount == Decimal(10.55).quantize(DEFAULT_MAX_DECIMALS)


def test_money_amount_fails_with_ugly_strings():
    with pytest.raises(ValueError):
        MoneyAmount(amount="not a nuuuuumber", currency=Currency.USD)


def test_money_amount_takes_string_for_currency():
    an_amount = MoneyAmount(amount="10.55", currency="USD")

    assert an_amount.currency == Currency.USD


def test_money_amount_works_with_8_decimal_positions():
    an_amount = MoneyAmount(amount="1.12345678", currency="USD")

    assert an_amount.amount == Decimal(1.12345678).quantize(DEFAULT_MAX_DECIMALS)